diff options
| author | Marek Vasut <marex@denx.de> | 2020-12-01 11:34:48 +0100 |
|---|---|---|
| committer | Patrick Delaunay <patrick.delaunay@foss.st.com> | 2021-01-13 09:52:58 +0100 |
| commit | 69ea30e688c4171830b94cd56d936ef6456877df (patch) | |
| tree | 6d4f01244e1c32435ae566aa36332936ce3d3898 /arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi | |
| parent | 635e233b220b7fa4f4e8e8623f971b5cf66c4856 (diff) | |
ARM: dts: stm32: Switch to MCO2 for PHY 50 MHz clock
The LAN8710i PHY currently uses 50 MHz clock direct from PLL4P.
To permit PLL4P to run at faster frequency, use MCO2 as a divider.
The PLL4P runs at 100 MHz, supplies MCO2 which divides it by 2 to
50MHz, and supplies the PHY with 50 MHz via pin PG2. The feedback
clock are fed back in via pin PA1.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Change-Id: Ia9bf7119785d49b633a3ae761c3dc4a30b92628a
Diffstat (limited to 'arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi')
| -rw-r--r-- | arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi index 92345b7ba3..6868769c6e 100644 --- a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi +++ b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi @@ -72,8 +72,8 @@ &pinctrl { /* These should bound to FMC2 bus driver, but we do not have one */ - pinctrl-0 = <&fmc_pins_b>; - pinctrl-1 = <&fmc_sleep_pins_b>; + pinctrl-0 = <&fmc_pins_b &mco2_pins_a>; + pinctrl-1 = <&fmc_sleep_pins_b &mco2_sleep_pins_a>; pinctrl-names = "default", "sleep"; fmc_pins_b: fmc-0 { @@ -130,6 +130,21 @@ <STM32_PINMUX('G', 12, ANALOG)>; /* FMC_NE4 */ }; }; + + mco2_pins_a: mco2-0 { + pins { + pinmux = <STM32_PINMUX('G', 2, AF1)>; /* MCO2 */ + bias-disable; + drive-push-pull; + slew-rate = <2>; + }; + }; + + mco2_sleep_pins_a: mco2-sleep-0 { + pins { + pinmux = <STM32_PINMUX('G', 2, ANALOG)>; /* MCO2 */ + }; + }; }; &pmic { @@ -181,7 +196,7 @@ CLK_PLL4_HSE CLK_RTC_LSE CLK_MCO1_DISABLED - CLK_MCO2_DISABLED + CLK_MCO2_PLL4P >; st,clkdiv = < @@ -195,7 +210,7 @@ 2 /*APB5*/ 23 /*RTC*/ 0 /*MCO1*/ - 0 /*MCO2*/ + 1 /*MCO2*/ >; st,pkcs = < @@ -258,7 +273,7 @@ pll4: st,pll@3 { compatible = "st,stm32mp1-pll"; reg = <3>; - cfg = < 1 49 11 11 11 PQR(1,1,1) >; + cfg = < 1 49 5 11 11 PQR(1,1,1) >; u-boot,dm-pre-reloc; }; }; |